Notes

This build lacks a CONFIG option on the main menu, just like the Japanese final.

The gun does more damage in this build, and monsters move more spaces per turn as well.

US version has uses X to select and O to go back these are reversed in the Japanese and proto versions.

US version also has actions in a different order. US: Action, Move, Wait, Status. Japan and proto: Move, Action, Wait, Status.

Koudelka has more spells available during the first fight in the proto (15) compared to US and Japanese final.(9)

Extra Spells: Flare, Geiser, Tornado, Megalith, Reflect, and one that doesn't do anything (Revive most likely, still not confirmed as I haven't actually progressed past the first fight so haven't had a chance to test it) Really easy to see why this was changed as it give you a very large unfair advantage.

Different game over screens between final and proto.

Since you have flare from the beginning you don't get it after the first fight.